Typewriting machine



Feb. 1, 1944. w. 'r. SAGNER 2,340,491

JIYPEWRITING MACHINE Filed April 8, 1.942 2 Sheets-Sheet l INVENTORaATTORNEY Feb. 1', 1944.' w, T, SAGNER 2,340,491

TYPEWRITING MACHINE Filed April 8, 1942 2 Sheets-Sheet 2 BY v f ATTORNEYPatented Feb. 1, 1944 UNITED STATES PATENT TYPEWRITING'MACHINE Walter T.Sa'gner, West Hartford, 0mm; fassignor to Underwood Elliott Fisherqcmpam New York, N. Y.,* aycorporation of Delaware Appucatiommrirs,1942; serial No. 43851 19 8'Claims. (oi. 197-64) 'Thisinventionrlatestoiypewntme and other mice machinshav'ing carriagemnd withirfjgnid tocertain more specific featiii'es'thereof to tbl'iciting speed controls'for the carriages of Such machines, and also to devices in suchmachines or suppressing or checking rebounding of 'the carriages whensuch are intercepted incident to taJbuIating.

One of the objects of the invention is to provide I H10 or suppressingdevice which is self-releasing after the tendency .of the carriage torebound-hes silbsided.

Another object of the-invention is torep'rovide a device ofeconomicmaniifacture, whichby application of iri'ctionelire'sistancesupiireis'ses rebounding'of the carriaQeQthus avoiding objectionableshock and noise;

It is also an object of the invention to provide a. device whichisbuilt' in alccoi'd withanylo'n'e or more of the above-noted" objects andwhich edditionally and in an efiicient" and reliable manner controls thespeed of the carriage during tabulating runs'thereof H v With these andother object in view, the invention includes'certain novel features ofconstruction and combination .of elements, the elements of which aresetforth in the appended claims, andal preferred form or embodiment ofwhich is hereina'iiter describd with refer nce to the drawings whichaccompany and'fornd part of ithisispecificetion. V

In the drawings:

Figure 1 es idelevltiori of a typewriting" machine embodying the presentinvention,

. Figure 2 is a. sectional plan view'of a carriage escapement mechanism,in association with fthe novel carriage-speed governor andrepentachecking device, the section being taken along ne. Q Ewe- Figure-3 isva. perspective view showing'lcertcin designated by the numeral 12.

II5i8gf of the combined overnor and grebonndecking device separated alona main axis hereof,

Figure '4 is a fractional side e evation; of the combined c rr age-spewovernor an reboundchecking'device inc fcondition governing thetailoulating speed of'the carriage v fFigure 5 is a view siniilar 'toFigurje 4, but the device of the'invention is ShQWfiil'l'Cdl'lditiOh to"check reboundingofithe'carriage; v

Eigi re 6 is a frcctionl pers'pective view of an d pe end of a tebmsstor reed, in *as's'ociatioii' with a-guideiplate therefor,

l ned-+1 'of Figur '5,"i11iistratin brake shces in rebound-checkingengagement with a '-'brike Directing attention now baiticularly toFigure 1,2, carriage I I is ad'ai'btd 'tdtr'avel in Ie'tte'r feed andreturn directions upon a, frame generally The frame em bodies a';transverse traekwa which guides a rail M constituting part of the carnae H there being antifrictior'ielements 1-5 interposed between the tlalckway and the rail. Each l aferal end of the rail 14 eerriesen'upright damage end trolled by an esc designated by the uniern zt.

l '6,"a;ridupon these ends is rotetably carried a conventional 5paper-supportin platen H. A spring motor l8 snpfiortdon' the name 1211313 a strap connection 2 Fwith the carriage, bym'eans oi vvhich it "isceiable "to "move said carnage in letter-feed dire V I n, fioI'eftto'right. Movemerit of the carriegfih wever, s normany cc 'hapeiiient mechanism genera-11y The escapeinent mechanism "comprises fa.holding dog 25*5116 a,

stepping dog 2-6, both-carried onerockeriiivvh'ch is -1q'iv0ted on anaxis 2 1 provided on a fr; esupported bracketsti'ncture'zfi n 40"infFigu'res l and g2, the holding As may be: seen dog; 25 is hedeseepemem I I s e ed-afghan carrying at its r pper end a, pinion 3'1meshing :Withe; rack-:32f'carifiied; by'the carriage; It will bese'enthatthe holding cog; through said escape. e w eeifizran a the parts 2s;31 than, incrany in eng' etgeinent with e, toot *n ali'y "hold "thecarriage against a'dvaince ni'o'v'ernentby thespr ng motor Hi. There; er3'jis yibrat udn responsefto each typing driers ition and each wordspacing operation, in a; jvman 'n er weliknowmbu not snown',.theescapementwneei be a ifetteiigfee :sjtjim e aav,

the reed 35 with a slot 44. depression of the tabulator key 4|, thecarriage therefore, has normally no control over the carriage. The upperend of the tabulator reed, as seen in Figure 6, is guided in a slot 36-providedin a horizontally disposed plate 31, the latter comprising thetop of a housing 38 which is carried in a rearwardly extendingrelationship by the trackway l3 of the machine frame. At the bottom, thereed 35 is articulated to the rear .end. of a tabulator key lever 4|which ispivoted 'to the frame intermediate its ends and which has a keybutton 42 in, or in thevicinity of, the keyboard. Operation of thetabulatorlever 4| raises the tabulator reed 35 into intercepting rangeof the nearest effectively positioned tabulator stop to the rightthereof. The extent of rise of the tabulator reed 35 is limited by a rod43 in;the housing 38, in cooperation with movement limiting abutmentsafforded by providing Incidental to the is released from the control ofthe escapement mechanism 22, so that the spring motor 8 is enabledtopropel it leftwardly until intercepted by the engagement of one of thetabulator stops 34 with the stop reed 35.

To release the carriage from the control of i the escapement mechanism,for a tabulating run,

the reed 35 operates a lever train comprising a .lever 45 and a lever46, the latter having apendent arm 41 for swinging the holding dog 25about its pivot, free of the escapement wheel 21.: In

. Figure 4, the lever 46 is shown actuated with the resultthat theholding dog 25 is no longer in engagement with the escapement wheel 2].The lever 46 may be pivotally carried on an appendage 48 of theescapement bracket structure 29, whereas thelever 46 may fulcrum on arod 5| providedinthe housing 38. Springs 52 and '53,

respectively, associated with the lever 45 and the .tabulating reed, a5,maintain :the tabulating mechanism normallyin an ineffective condition.

Inasmuch a-s the tabulating run of the carriage 'may ofconsiderablelength; that is, of some duration, it is desirable that thereed 35, upon operation, be latchedin effective position, thus relieving.the operator of any necessity I H to sustain depression ofthe tabulatorkey 42. To' this end, the reed 35i (see Figures 1 and 6) is formed witan ere? at 5 v h n ra the reed, catches over theright edge of the slot 736 in theplatei3'l, it being notedthat the spring 52 is'arrang'edatja'n' angle to swing the reed rightwardly about its point ofarticulation with the tabulator key lever 4|. Therefore, althoughtheoperator may "release the tabulator key immediately afterdepression," the tabulator reed 35 remains raised for the duration ofthetabulaf'tion run. As the carriage is being intercepted by theengagement of an effectively positioned carriage stop 34 with thetabulator reed 35, the latter is being displaced limitedly inletter-feed direction, sufficiently to permit the reed, 35 towithdraw-downwardly, within the slot 36, clear of'the tabulatorstop-providing, however,

that

10 effectively positioned tabulator stops 34, and,

' the escapement wheel.

In order that the carriage may not attain an undesirable speed duringtabulating runs, it has --been a common practice to associate retardingr'neanstherewith. Many forms of such means are known. Also known aredevices to suppress or check'rebounding of the carriage incidental tobeing intercepted at the end of tabulating runs, rebounding being highlyobjectionable in that it is liable to cause the escapementto assumecontrol .over the carriage while thelatteris in a rebounded position. a7

The present invention embodies, ma single device, reliable .means tocontrolthe tabulating speed of the carriage and to suppress or checkrebounding thereof at the termination of tabulating runs. In theembodiment of the invention illustrated, this device is. in the form ofa "centrifugal governor 56, henceforth to be described. A governor. headorrotor 5|,is rotatable upon an arbor 58 .which is fa st uponxan arm 6|pivoted for movementtoward and away from thejescapement wheel shaft 28.There is fastened to revolve concentrically with the rotor 51, a smallspiral gear 62 which isnormally out of mesh with a larger spiral gear63, the latter being fast on and unitarily revolvable with theescapement wheel shaft'28. Upon actuation of the tabulator key 42;thearm 4l of the lever 46, as hereinbefore stated, swings forwardly anddisengages the holdingdog 25 from the escapement wheel 'Zl.Simultaneously, the .rotor carrying arm 6| is urged toward the saidlarge gear 63 by the arm 41, through the intermediary of a spring 64.This results in the engagement of the small gear 62 with the large gear63,-as illustratedin Figure 4. The normal position of the rotorcarrying'arm; BI is determined bythe normal position of'the"lever-A6,the spring 64. being effective to draw-the arrn into contact withthependent lever arm 41. 'Since operation of the arm 41 also causes therelease of, the carriage from the escapementrit-follows that, during theensuing carriage run, the rotor 5 |"is rotated. The direction of thespiral teeth on the'gears 62 and 63 is such that the small gear 62;while being rotated' during tabulating runs', is thrust 'downwardlyagainst the supporting arm 6 I Flyweight "arms 65 are pivotally mountedupon-the rotor "5'! to swing 'by centrifugal force outwardly against atapered braking drum 66 which is carried concentrically on"the arbor 5B,"the drum having a flanged end 61 providedwith'athreaded socketwhereinto a threaded portionof the arbor extends, a lock nut fi8being-fladapte'd to be drawn up against the flange to c'lamp the drumsecurely to the arbon, Preferably eachfiyweight arm 65 has imbedded in agroove a friction shoe of a 'suitablematerial, the shoe having a curvedbrakingface of considerable extent. When the carriage is at rest, theflyweight arms 65 maybe touching; each other: as

at 12, see Figure 2, and consequently the shoes H, are out of brakingcontact withjjthe-drfum. During tabulations; as the rotor '5l'is beingdrivfiyweights, the efiectbeing to increase or decrease the effectivediameter of theoriimlififand to cause thereby the shoestc engagethenru'm at 'diiferentpointsjfrom thefflyweight fulcrums.

The leverage at which the flyweightamayfact upon the drum is thuschanged andfth'e Fre'sult is that the 'tabul'ating speed of thecarriage-can be regulated. When the carriage is intercepted "brought toan abrupt stop, but thefrotor 51, by

having soi'n'ebapacity for axial displacement awayrrom thearhi B l, iSmomentarily andwed -t'o continue movementby itspowe'r "of momentum alongan'upwardlyspiralingpath governed by the teeth of fthusdefiectedupwardlyuntil "the friction shoes the spi'ralgear 63. ThegearfSTis against the interior of'the drum '66, stee -Figures that,inasmuch as'the "speed of the rotor is faster than'the carriage, "therotor spirals very "quickly to rebound checkingposition.Furth'er'of'bene- .fit is "the fact that an rebounding movement of thecarriagetha't mighto'ccur has a tendency towe'd'ge the flyweightsiritofirmer engagement with the tapered'face of thed'ruiny A"'split ringsprung into a circumferential "groov'eon the arbor 58, seeFigu'res 1 and'5, "retains the governor head against removal from the arbor'whn,

the brake drum -66 isi removed. Otherwise, the split ring serves "nofunction. Preferably, as hereinbefore pointed out, the holding dog 25automatically assumes control over the carriage at the termination ofthe tabulating run of the carriage, incidental to a slight leftwarddisplacement of the tabulator reed 35. The spring 53 at such timerestores the lever 46 to the normal position seen in Figure 1, therebyeffecting a separation of the gear 62 from the gear 63, the carriagebeing then restored to the control of the escape mechanism. The taper ofthe drum 66 is such that the flyweights will separate from the drum whenthe gears become unmeshed, or, at least, upon commencement of the nexttabulating run of the carriage, it being remembered that the tendency ofthe gear 63 is to draw the rotor 57 downwardly during tabulations.

While the invention provides, in a single device, very eflicient meansto control the carriage in its tabulating travel, and to check itsrebounding, it is to be understood that the device may be built solelyto check or prevent rebounding. For example, the friction shoes H may befixed directly to the rotor 51.

As can be seen in Figure 2, the rotor carrying arm 6| has a stop ear 13which prevents the gears 62, 63 from being meshed too tightly.Furthermore, in order to give the arm 6| a firm support against fiexureor displacement in the di- 10 It may, therefore, be seen that theinvention is --es'p'e'cially advantageouslyapplicable to amachineembodying a series of selectively project- "a' bletabulatingcounterstops, such as are used, "for example, for decimal tabulating andcolumn- 5 selecting tabulating.

What is'claime'd is: r

1. In a machine of the class described having a carriage, means 'totabulate the *carriztgegcar 'ri'age-intercepting m'eans, a rotatablespiral gear having "a 'momentum accumulating amass associated therewithand having capacity for :axial movement,means limiting the axialmovement of said spiral gear in one directiong-means for Irotating saidspiral gear during tabulations, in-

eluding spiral-gear means so cooperative with said spiral gear thatduring tabulations said spiral'gear is rotated inaipositionthrust-against said limiting-meansysaicl-spiral-gear meansvbeing arrested concomitant to the interception of go the carriage, butsaid'spiral 'gearabeing adapted 'to continue rotation by momentum in f aspiraling path, away from said limiting means,x=by reacting against thearrested spiral-gear means, and means rendered effective by thespiraling movement of said spiral gear to check rebounding of thecarriage. i

g 2. In a machine of the class described having a carriage; means totaubuate the carriage, carriage-intercepting means, a rotatable-"spiral:gear

,mhaving a momentum-accumulating mass associated therewith and havingcapacity for axial movement, means limiting the axial movement of saidspiral gear in one direction, means for rotating said spiral'gear duringtabulations, including spiral-gear means so cooperative with said spiralgear that during tabulations said spiral gear is rotatedii'na-positionthrust against said limiting means, said spiral-gear meansbeing arrested concomitant to the interception of the carriage, but saidspiral gear being adapted to continue rotation by momentum in aspiraling path, away from said limiting means, by reacting against thearrested spiral-gear means, a brake drum, and means forced intofrictional engagement with said brake drum by the rotation of saidspiral gear in the said spiraling path.

3. In a machine of the class described having a carriage; means totabulate the carriage, carflags-intercepting means, a carriage-speedgovtatable gear element having capacity for axial movement, meanslimiting axial movement of said gear element in one direction, andbraking means on said gear element adapted to be forced into brakingcontact with said member by centrifugal action, said braking means beingalso adapted to be forced into braking contact with said member'by axialdisplacement of said gear element away from said limiting means, andmeans being carriage driven during tabulation, to rotate said gearelement, the teeth of said gear element and said gear means beingdesigned to cause a deflection of said gear element in response to theinterception of the carriage, ax-

78 ially away from said limiting means, the gear ernor comprising, anon-rotative member, a ro- V interception by said stop means,.

governor for controlling the speed of said mov-- element during thisdeflection beingmoved by I momentum, whereby said braking means in asandgear means. being so formed that said gear will be axially deflectedunder the power of momentum upon the interception of said gear means,and means responsive to the deflection of said gear means to checkrebounding of said wmovable means when intercepted.

5. In a machine of the class described, stop means, meansincluding gearmeans movable for a centrifugal able means, a gear rotatable by saidgear means to drive said governor,-said gear having capacity fordeflection normal location, and the teeth of said gear and said gearmeans being so formed that said gear will be axially deflected under thepower of momentum upon the interception of said gear means, saidgovernor being so constructed as to be rendered effective to checkrebounding of said movable means responsive to the deflection of saidgear.

I 6. In a machine of the class described having a carriage, meansconditionable for imparting tabulatingmovement to thecarriage, tabulatorstop-means conditionable, to intercept the carriage,momentum-accumulating means comprising a rotatable gear, meanscomprising gear means for rotating said gear during tabulations,

said gear being normally out of mesh with said gear means, and meansoperable to condition both said conditionable means and to mesh saidgear and said gear means, whereby during the ensuing tabulation saidgear is rotated, said gear having capacity for deflection in one axialdirection from a normal location and the teeth of said in one axialdirection from a gear and said'gear means being so formed that, I

upon the interception of the carriage, the said i gear will beaxially'deflected by power of moc mentum, and means responsive to the.deflection of said gear to check rebounding of said carriage.

'7; In a machine of the class described having a carriage, meansconditionable for imparting tabulating movement to the carriage,tabulator stop-means Tconditionable .to intercept the carriagegacentrifugal governor forcontrolling the tabulating speed'of thecarriage, including, a rotor and a gear unitarily rotatable with saidrotor,

carriage-driven gear means, said gear and gear means being normally outof mesh,and means to condition both said conditionable means and Vconcomitantly to mesh said gear and gear means, whereby duringtabulation said governor, controls the speed 'of'the carriage, said gearand said rotor having capacity for deflection in oneaxial direction froma normal location and the teeth, of said gear and said gear means beingso formed that, upon the interception of the carriage, the said gearwill be axially deflected by power' of momentum, the said, governorbeing so constructed as to become effective to check rebounding of thecarriage to the said deflection of said gear.

8. In a machine of the class described havin a carriage, means totabulate the carriage, 'carriage-intercepting means, a conicalbrake-drum, a rotatable gear, carriage-driven gear means to rotate saidgear, a governor head rotatable unitarily with said gear, friction shoemeans on said head adapted to be thrown radially into contact with saiddrum by centrifugal action,

thereby to control the tabulating speed of the carriage, said gear andhead having capacity for deflection axially toward the smaller end ofsaid drum, such deflection being adapted to bring the friction shoemeans into braking engagement with said drumindependently of centrifugalac- 7 tion, the teeth ofvsaid gear and gear means being of such formthat, upon interception of the carriage, said gear becomes automaticallydeflected axially toward the smaller end of the drum,

thereby to check rebounding of the carriage.

' WALTER T. SAGNER.

CERTIFICATE OF CORRECTION. Patent No. 2,5l o,L 91. February 1, 191m.

WALTER T. SAGN ER.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 5,sec- 0nd column, line 37, claim 2, for "taubuate" read --tabulate-; pagei}, first column, ine 11;, claim 1;, and line '28, claim 5, strike outthe word "the"; and second column, line 26, claim'7, after "carriage"insert -responsive--; and that the said Letters Patent should be readwith this correcti on therein that the same may conform to the record ofthe case in the Patent Office.

Signed and sealed this 25th day of April, A. D. 19%.

Leslie Frazer (Sea-l) Acting Commissioner of Patents.

